1. Write as an algebraic equation:
12 + n ≤ 2n - 8
2. Solve for n.
12 + n - 12 ≤ 2n - 8 - 12
n ≤ 2n - 20
n - 2n ≤ 2n - 20 - 2n
-n ≤ -20
Multiply both sides by -1 (this means you must flip the inequality sign).
n ≥ 20
FINAL ANSWER: n ≥ 20
Hope this helps! Feel free to ask for clarification.
You might have the correct answer !
1. <span>✔ 2(8x – 1) + 2(2x + 4)</span>
2. <span>✔ 16x – 2 + 4x + 8
3.</span><span><span><span>✔ (20x + 6)</span></span></span>
Answer:
(-4,1)
Step-by-step explanation:
A system of equations is 2 or more equations for which the same x,y solution exists. We can solve the system in three ways: elimination, substitution, or graphing. Substitution can be used by substituting the value of one variable into the equation.
<u>Pair 2.5x-3y=-13 and 3.25x-y=-14</u>
We can solve for y in 3.25x-y=-14. 3.25x+14=y.
Because y=3.25x+14, we can substitute 3.25x+14 into y in 2.5x-3y=-13.
2.5x-3y=-13
2.5x-3(3.25x+14)=-13
2.5x-9.75x-42=-13
-7.25x-42=-13
-7.25x=29
x= -4
We now substitute x=-4 into y=3.25x+14
y=3.25x+14
y=3.25(-4)+14
y=-13+14
y=1
Firstly attention should pe paid to the exact words given in the problem and then only the answer can be easily deduced.
It is a 2 digit number and that is said in the problem
Now For the tens digit it has been said that it is 8 more than the ones digit. The ones digit cannot be zero and that is already mentioned in the problem.
So if we take the ones digit to be 1, then the tens digit will be= 8 +1
= 9
Now if we take the ones digit to be 2, then the tens digit will be = 2 + 8
= 10
So it cannot be 2 as the tens digit takes the number to a 3 digit number and it is not possible.
So the answer to this problem is 91.